package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
@Slf4j
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐
     * @param setmealDTO
     */
    @Override
    public void add(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.add(setmeal);
        Long setmealId = setmeal.getId();
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        //底层ThreadLocal保存了页码和每页记录数
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        //从数据库中取出数据,数据类型为对应的
        Page<SetmealVO>pageQuery =setmealMapper.pageQuery(setmealPageQueryDTO);
        //将数据按照要求传回前端
        return new PageResult(pageQuery.getTotal(), pageQuery.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    public void delete(List<Long> ids) {
        //起售中的套餐是不能被删除的
        for (Long id : ids) {
           Setmeal setmeal= setmealMapper.getById(id);
            if (setmeal.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        //根据传过来的套餐id先删除套餐
        for (Long id : ids) {
            setmealMapper.delete(id);
            setmealDishMapper.deleteBySetmealId(id);
        }
        //删除套餐里面的菜品
    }

    /**
     * 根据id查询套餐
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        Setmeal setmeal=setmealMapper.getById(id);
        List<SetmealDish>setmealDishes=setmealDishMapper.getBySetmealId(id);
        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);

        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Override
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //修改套餐表
        setmealMapper.update(setmeal);
        //得到套餐id
        Long setmealId = setmealDTO.getId();
        //通过套餐id删除套餐下的菜品
        setmealDishMapper.deleteBySetmealId(setmealId);
        //套餐下的菜品重新输入
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        setmealDishMapper.insertBatch(setmealDishes);


    }

    /**
     * 套餐起售，停售
     * @param status
     * @param id
     */
    @Override
    public void changeStatus(Integer status, Long id) {
        //套餐下的菜品
        if (status==StatusConstant.ENABLE){
            List<Dish> dishList=  dishMapper.getBySetmealId(id);
            if (dishList!=null &&dishList.size()>0){
                dishList.forEach(dish -> {
                    if (StatusConstant.DISABLE == dish.getStatus()) {
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }

        }
     Setmeal setmeal=Setmeal.builder()
            .id(id)
            .status(status)
            .build();
        setmealMapper.update(setmeal);
    }
    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }
    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

}
